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| THE EXCITATION OF VIBRATING SHAPE OF ULTRASONIC MOTOR VIBRATORS |
| Li Cuncen Yang Ming Li Shiyang |
| (Department of Instrument Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China) |
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Abstract Ultrasonic motors employ the converse piezoelectric effect to excite the resonant mode of vibrator and utility the friction between vibrator and rotor to drive. The methods of exciting ultrasonic motors could be classified into three categories according to the number of vibration modes which used to superpose the periodic movement of point on contact surface; they are single vibration mode, superposition of two vibration modes with same frequency and superposition of multi-vibration-mode. Then the principles and characteristics of typical ones of each category are presented. At last the development of the exciting method of ultrasonic motors is addressed.
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Received: 09 September 2008
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Corresponding Authors:
Li Cuncen
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2009, Vol. 28 
